Question 39

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Jambmaths question: 

Evaluate $\int_{1}^{2}{(6{{x}^{2}}-2x)dx}$

Option A: 

16

Option B: 

13

Option C: 

12

Option D: 

11

Jamb Maths Solution: 

$\begin{align} & \int_{1}^{2}{(6{{x}^{2}}-2x)dx}=[2{{x}^{3}}-{{x}^{2}}]_{1}^{2} \\ & =[2{{(2)}^{3}}-{{2}^{2}}]-[2{{(1)}^{3}}-{{1}^{2}}] \\ & =12-1 \\ & =11 \end{align}$

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